Hot water is an essential requirement in most Residence. Gas, electricity and furnace oil are beingused for obtaining hot water. These sources are not readily available and are scarce in a part of Japanat present. Fortunately, solar thermal energy is plentiful which can be successfully harnessed forgetting hot water. In this paper, performance of the copper coil heat exchanger type solar water heaterhas been described, which provides domestic hot water for a four-person family.
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